openwrt/target/linux/brcm2708/patches-4.4/0008-serial-8250-Don-t-cras...

21 lines
609 B
Diff

From 5638cf1b2b8a418553790662c414b29ced8521dd Mon Sep 17 00:00:00 2001
From: Phil Elwell <phil@raspberrypi.org>
Date: Tue, 30 Jun 2015 14:12:42 +0100
Subject: [PATCH] serial: 8250: Don't crash when nr_uarts is 0
---
drivers/tty/serial/8250/8250_core.c | 2 ++
1 file changed, 2 insertions(+)
--- a/drivers/tty/serial/8250/8250_core.c
+++ b/drivers/tty/serial/8250/8250_core.c
@@ -509,6 +509,8 @@ static void __init serial8250_isa_init_p
if (nr_uarts > UART_NR)
nr_uarts = UART_NR;
+ if (!nr_uarts)
+ return;
for (i = 0; i < nr_uarts; i++) {
struct uart_8250_port *up = &serial8250_ports[i];